1.	Simplify 1 Simplify the following expression: $$ 2\times5(-3) - \left(5(-1) + 4(-4)\right) $$ Correct Answer $$ -9$$ or -9.00000

2.	Simplify 2 Simplify the following expression: $$ 2\frac{4}{-1}\left(-5(-5) + 5(-5)\right) $$ Correct Answer $$ 0$$ or 0.0

3.	Fractions 1 Simplify the following expression: $$ \frac{3}{5} - \frac{-1}{2} $$ Correct Answer $$ \frac{11}{10}$$ or 1.1

4.	Fractions 2 Simplify the following expression: $$ \frac{-1}{5}\frac{4}{3} $$ Correct Answer $$ \frac{-4}{15}$$ or -0.26666666666666666

5.	Significant figures 1. Write the following to 4 significant figures: 428.46163 Correct Answer 428.5 or $$4.285\times10^{2}$$ 2. Write the following to 2 significant figures: 0.000035761837 Correct Answer 0.000036 or $$3.6\times10^{-5}$$

6.	Standard Form 1. Write the following in standard form to 2 significant digits: 0.000000430671 Correct Answer $$4.3\times10^{-7}$$ 2. Write the following in standard form to 2 significant digits: 81921.3 Correct Answer $$8.2\times10^{4}$$

7.	Significant figures 1. Write the following in preferred standard form to 5 significant digits: 514.878 Correct Answer $$514.88\times10^{0}$$ 2. Write the following in preferred standard form to 5 significant digits: 1.13089 Correct Answer $$1.1309\times10^{0}$$

8.	Simplify 2 Simplify the following expression: $$ {\left({(-2)}^{3}\right)}^{2} + \left(-6 - 3\right)\left(3 + 2\right) $$ Correct Answer $$ 19$$ or 19.0000

9.	Simplify 1 Simplify the following expression: $$ 2\left(5 - 1\right)\left(3 + 4 - \left(-1 + 3\right)\right) $$ Correct Answer $$ 40$$ or 40.0000

10.	Simplify 2 Simplify the following expression: $$ \frac{3(-1)}{5 + 2} - {\left(-1 - 5\right)}^{2} $$ Correct Answer $$ \frac{-255}{7}$$ or -36.4286